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Impact of Sowing Dates on Terminal Heat Tolerance of Different Wheat (Triticum aestivum L.) Cultivars

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Title Impact of Sowing Dates on Terminal Heat Tolerance of Different Wheat (Triticum aestivum L.) Cultivars
Not Available
 
Creator Rachana Dubey
Himanshu Pathak; Shivdhar Singh; Bidisha Chakravarti; Amod Kumar Thakur; Ram Kishor Fagodia
 
Subject Grain yield Indo-Gangetic plains Sowing date Terminal heat stress Wheat
 
Description Not Available
Abstract Terminal heat stress leads to significant yield
reduction in wheat. Adaptation strategies to combat this
could be either growing heat-tolerant cultivars or adjustments in sowing date. A study was conducted for 2 years to
understand the impact of terminal heat stress on wheat
using three different wheat cultivars (HD 2932, WR 544
and HD 2967) and three sowing date, viz. D1 (second week
of November), D2 (first week of December) and D3 (last
week of December) at Indian Agricultural Research Institute (IARI), New Delhi, India. Results revealed that timely
sown crop (D1) showed significantly higher number of
tillers m-2 (450), plant height (93.5 cm), 1000-grain
weight (38 g), grain yield (6.3 t ha-1
) and harvest index
(0.44) compared with D2 and D3. Yield loss occurred by
70, 29 and 77 kg ha-1 per day due to delay in sowing
beyond D1 in varieties, viz. ‘HD 2932,’ ‘WR 544’ and ‘HD
2967,’ respectively. The late-sown crop resulted lower
yield, which encountered higher temperature in its terminal
growth stages. Among three varieties used, ‘WR 544’ had
lesser decline in growth and yield than other two varieties
due to late sowing. It implied that ‘WR 544’ had thermotolerant characteristics. Higher yield in wheat requires both
heat-tolerant cultivars and better agronomic strategy under
terminal heat stress condition. This study concluded that
varietal selection and adjustment in sowing date could be
the appropriate adaptation strategies under changing climate especially the terminal heat stress
Not Available
 
Date 2019-11-01T07:41:53Z
2019-11-01T07:41:53Z
2019-01-04
 
Type Article
 
Identifier Dubey, R., Pathak, H., Singh, S., Chakravarti, B., Thakur, A.K. and Fagodia, R.K. 2019. Impact of sowing dates on terminal heat tolerance of different wheat (Triticum aestivum L.) cultivars. National Academy Science Letters, https://doi.org/10.1007/s40009-019-0786-7
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/24249
 
Language English
 
Relation Not Available;
 
Publisher National Academy of Sciences, India